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Finding the Fourth Proportional to 74,932.70, 103,405.91 and 40,940.46

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Solution

The fourth proportional to 74,932.70, 103,405.91 and 40,940.46 is: 56,497.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,932.70 : 103,405.91 = 40,940.46 : x
  2. Step 2: Convert to fraction form
    74,932.70/103,405.91 = 40,940.46/x
  3. Step 3: Cross multiply
    74,932.70x = 103,405.91 × 40,940.46
  4. Step 4: Simplify right side
    74,932.70x = 4,233,485,290.51
  5. Step 5: Solve for x
    x = 4,233,485,290.51/74,932.70
  6. Step 6: Final answer
    x = 56,497.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.